Where is the asset server database stored on my hard drive?

Until now I’ve been just grabbing my whole project directory and dumping it on an external hard drive for an external backup, but since all of my backups running back 3 months seem to now be corrupt I need to know how to save the whole database externally…but where is it stored? It seems that just saving the project folder doesn’t actually work.

Alternatively, what are the best practices fro external backup when using Asset server?

Cheers

See: http://docs.unity3d.com/356/Documentation/Components/assetserver-Setup.html and http://docs.unity3d.com/356/Documentation/Manual/AssetServer.html.